Nankang JD444 AR-1 245/40ZR17 95W XL Semi-Slick Track Tire

The Nankang AR-1 JD444 is a 245/40ZR17 semi-slick competition tire, also called a track or trackday tire. It is built for drivers who want more grip and quicker lap times. The size is 245/40ZR17 with a 95W XL service description.

Key Features:

• Size: 245/40ZR17
• Service description: 95W, meaning load index 95 and W speed rating, with XL (extra load) construction
• Semi-slick compound: warms up quickly and keeps operating temperatures consistent
• 100 treadwear option: a sticky, grip-focused compound
• Tread depth: about 5.5 mm (roughly 7/32 in)
• Tread and sidewall design: a wider contact patch for better grip and stability at high speed
• Kevlar lining: 100 treadwear AR-1 tires in 17 inch and larger sizes produced from 2019 include it for added stability and consistency
• EU tire labeling: the AR-1 has EU labeling, which gives it MSA List 1B approval

The AR-1 is used as a control tire in several race series and suits track days, autocross and time attack. It is a performance tire, and wet grip is much lower than its dry grip.